diff --git a/Modules/Radiometry/OpticalCalibration/include/otbImageToLuminanceImageFilter.h b/Modules/Radiometry/OpticalCalibration/include/otbImageToLuminanceImageFilter.h
index 1bb82df74119b372c0f953e06536d786156db81e..1772f930b5864724a350114ed33d9fe886d07006 100644
--- a/Modules/Radiometry/OpticalCalibration/include/otbImageToLuminanceImageFilter.h
+++ b/Modules/Radiometry/OpticalCalibration/include/otbImageToLuminanceImageFilter.h
@@ -22,7 +22,6 @@
 #ifndef __otbImageToLuminanceImageFilter_h
 #define __otbImageToLuminanceImageFilter_h
 
-#include "otb_6S.h"
 #include "otbUnaryImageFunctorWithVectorImageFilter.h"
 #include "itkNumericTraits.h"
 #include "otbMacro.h"